1 | /*
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2 | This file is part of the lzop file compressor.
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3 |
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4 | Copyright (C) 1996..2003 Markus Franz Xaver Johannes Oberhumer
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5 | All Rights Reserved.
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6 |
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7 | Markus F.X.J. Oberhumer <markus@oberhumer.com>
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8 | http://www.oberhumer.com/opensource/lzop/
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9 |
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10 | lzop and the LZO library are free software; you can redistribute them
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11 | and/or modify them under the terms of the GNU General Public License as
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12 | published by the Free Software Foundation; either version 2 of
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13 | the License, or (at your option) any later version.
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14 |
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15 | This program is distributed in the hope that it will be useful,
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16 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 | GNU General Public License for more details.
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19 |
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20 | You should have received a copy of the GNU General Public License
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21 | along with this program; see the file COPYING.
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22 | If not, write to the Free Software Foundation, Inc.,
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23 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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24 |
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25 | "Minimalized" for busybox by Alain Knaff
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26 | */
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27 |
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28 | #include "libbb.h"
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29 | #include "archive.h"
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30 | #include "liblzo_interface.h"
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31 |
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32 | /* lzo-2.03/src/lzo_ptr.h */
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33 | #define pd(a,b) ((unsigned)((a)-(b)))
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34 |
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35 | #define lzo_version() LZO_VERSION
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36 | #define lzo_sizeof_dict_t (sizeof(uint8_t*))
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37 |
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38 | /* lzo-2.03/include/lzo/lzo1x.h */
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39 | #define LZO1X_1_MEM_COMPRESS (16384 * lzo_sizeof_dict_t)
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40 | #define LZO1X_1_15_MEM_COMPRESS (32768 * lzo_sizeof_dict_t)
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41 | #define LZO1X_999_MEM_COMPRESS (14 * 16384 * sizeof(short))
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42 |
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43 | /* lzo-2.03/src/lzo1x_oo.c */
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44 | #define NO_LIT UINT_MAX
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45 |
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46 | /**********************************************************************/
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47 | static void copy2(uint8_t* ip, const uint8_t* m_pos, unsigned off)
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48 | {
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49 | ip[0] = m_pos[0];
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50 | if (off == 1)
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51 | ip[1] = m_pos[0];
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52 | else
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53 | ip[1] = m_pos[1];
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54 | }
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55 |
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56 | static void copy3(uint8_t* ip, const uint8_t* m_pos, unsigned off)
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57 | {
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58 | ip[0] = m_pos[0];
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59 | if (off == 1) {
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60 | ip[2] = ip[1] = m_pos[0];
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61 | }
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62 | else if (off == 2) {
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63 | ip[1] = m_pos[1];
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64 | ip[2] = m_pos[0];
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65 | }
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66 | else {
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67 | ip[1] = m_pos[1];
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68 | ip[2] = m_pos[2];
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69 | }
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70 | }
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71 |
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72 | /**********************************************************************/
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73 | // optimize a block of data.
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74 | /**********************************************************************/
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75 | #define TEST_IP (ip < ip_end)
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76 | #define TEST_OP (op <= op_end)
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77 |
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78 | static NOINLINE int lzo1x_optimize(uint8_t *in, unsigned in_len,
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79 | uint8_t *out, unsigned *out_len,
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80 | void* wrkmem UNUSED_PARAM)
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81 | {
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82 | uint8_t* op;
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83 | uint8_t* ip;
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84 | unsigned t;
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85 | uint8_t* m_pos;
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86 | uint8_t* const ip_end = in + in_len;
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87 | uint8_t* const op_end = out + *out_len;
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88 | uint8_t* litp = NULL;
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89 | unsigned lit = 0;
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90 | unsigned next_lit = NO_LIT;
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91 | unsigned nl;
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92 | unsigned long o_m1_a = 0, o_m1_b = 0, o_m2 = 0, o_m3_a = 0, o_m3_b = 0;
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93 |
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94 | // LZO_UNUSED(wrkmem);
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95 |
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96 | *out_len = 0;
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97 |
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98 | op = out;
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99 | ip = in;
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100 |
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101 | if (*ip > 17) {
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102 | t = *ip++ - 17;
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103 | if (t < 4)
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104 | goto match_next;
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105 | goto first_literal_run;
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106 | }
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107 |
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108 | while (TEST_IP && TEST_OP) {
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109 | t = *ip++;
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110 | if (t >= 16)
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111 | goto match;
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112 | /* a literal run */
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113 | litp = ip - 1;
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114 | if (t == 0) {
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115 | t = 15;
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116 | while (*ip == 0)
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117 | t += 255, ip++;
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118 | t += *ip++;
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119 | }
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120 | lit = t + 3;
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121 | /* copy literals */
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122 | copy_literal_run:
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123 | *op++ = *ip++;
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124 | *op++ = *ip++;
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125 | *op++ = *ip++;
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126 | first_literal_run:
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127 | do *op++ = *ip++; while (--t > 0);
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128 |
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129 | t = *ip++;
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130 |
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131 | if (t >= 16)
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132 | goto match;
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133 | #if defined(LZO1X)
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134 | m_pos = op - 1 - 0x800;
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135 | #elif defined(LZO1Y)
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136 | m_pos = op - 1 - 0x400;
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137 | #endif
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138 | m_pos -= t >> 2;
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139 | m_pos -= *ip++ << 2;
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140 | *op++ = *m_pos++;
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141 | *op++ = *m_pos++;
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142 | *op++ = *m_pos++;
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143 | lit = 0;
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144 | goto match_done;
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145 |
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146 |
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147 | /* handle matches */
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148 | do {
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149 | if (t < 16) { /* a M1 match */
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150 | m_pos = op - 1;
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151 | m_pos -= t >> 2;
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152 | m_pos -= *ip++ << 2;
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153 |
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154 | if (litp == NULL)
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155 | goto copy_m1;
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156 |
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157 | nl = ip[-2] & 3;
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158 | /* test if a match follows */
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159 | if (nl == 0 && lit == 1 && ip[0] >= 16) {
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160 | next_lit = nl;
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161 | /* adjust length of previous short run */
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162 | lit += 2;
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163 | *litp = (unsigned char)((*litp & ~3) | lit);
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164 | /* copy over the 2 literals that replace the match */
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165 | copy2(ip-2, m_pos, pd(op, m_pos));
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166 | o_m1_a++;
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167 | }
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168 | /* test if a literal run follows */
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169 | else
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170 | if (nl == 0
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171 | && ip[0] < 16
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172 | && ip[0] != 0
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173 | && (lit + 2 + ip[0] < 16)
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174 | ) {
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175 | t = *ip++;
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176 | /* remove short run */
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177 | *litp &= ~3;
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178 | /* copy over the 2 literals that replace the match */
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179 | copy2(ip-3+1,m_pos,pd(op,m_pos));
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180 | /* move literals 1 byte ahead */
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181 | litp += 2;
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182 | if (lit > 0)
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183 | memmove(litp+1, litp, lit);
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184 | /* insert new length of long literal run */
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185 | lit += 2 + t + 3;
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186 | *litp = (unsigned char)(lit - 3);
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187 |
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188 | o_m1_b++;
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189 | *op++ = *m_pos++; *op++ = *m_pos++;
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190 | goto copy_literal_run;
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191 | }
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192 | copy_m1:
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193 | *op++ = *m_pos++;
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194 | *op++ = *m_pos++;
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195 | } else {
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196 | match:
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197 | if (t >= 64) { /* a M2 match */
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198 | m_pos = op - 1;
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199 | #if defined(LZO1X)
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200 | m_pos -= (t >> 2) & 7;
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201 | m_pos -= *ip++ << 3;
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202 | t = (t >> 5) - 1;
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203 | #elif defined(LZO1Y)
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204 | m_pos -= (t >> 2) & 3;
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205 | m_pos -= *ip++ << 2;
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206 | t = (t >> 4) - 3;
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207 | #endif
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208 | if (litp == NULL)
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209 | goto copy_m;
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210 |
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211 | nl = ip[-2] & 3;
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212 | /* test if in beetween two long literal runs */
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213 | if (t == 1 && lit > 3 && nl == 0
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214 | && ip[0] < 16 && ip[0] != 0 && (lit + 3 + ip[0] < 16)
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215 | ) {
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216 | t = *ip++;
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217 | /* copy over the 3 literals that replace the match */
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218 | copy3(ip-1-2,m_pos,pd(op,m_pos));
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219 | /* set new length of previous literal run */
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220 | lit += 3 + t + 3;
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221 | *litp = (unsigned char)(lit - 3);
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222 | o_m2++;
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223 | *op++ = *m_pos++;
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224 | *op++ = *m_pos++;
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225 | *op++ = *m_pos++;
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226 | goto copy_literal_run;
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227 | }
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228 | } else {
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229 | if (t >= 32) { /* a M3 match */
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230 | t &= 31;
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231 | if (t == 0) {
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232 | t = 31;
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233 | while (*ip == 0)
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234 | t += 255, ip++;
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235 | t += *ip++;
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236 | }
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237 | m_pos = op - 1;
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238 | m_pos -= *ip++ >> 2;
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239 | m_pos -= *ip++ << 6;
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240 | } else { /* a M4 match */
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241 | m_pos = op;
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242 | m_pos -= (t & 8) << 11;
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243 | t &= 7;
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244 | if (t == 0) {
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245 | t = 7;
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246 | while (*ip == 0)
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247 | t += 255, ip++;
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248 | t += *ip++;
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249 | }
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250 | m_pos -= *ip++ >> 2;
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251 | m_pos -= *ip++ << 6;
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252 | if (m_pos == op)
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253 | goto eof_found;
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254 | m_pos -= 0x4000;
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255 | }
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256 | if (litp == NULL)
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257 | goto copy_m;
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258 |
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259 | nl = ip[-2] & 3;
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260 | /* test if in beetween two matches */
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261 | if (t == 1 && lit == 0 && nl == 0 && ip[0] >= 16) {
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262 | next_lit = nl;
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263 | /* make a previous short run */
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264 | lit += 3;
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265 | *litp = (unsigned char)((*litp & ~3) | lit);
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266 | /* copy over the 3 literals that replace the match */
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267 | copy3(ip-3,m_pos,pd(op,m_pos));
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268 | o_m3_a++;
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269 | }
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270 | /* test if a literal run follows */
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271 | else if (t == 1 && lit <= 3 && nl == 0
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272 | && ip[0] < 16 && ip[0] != 0 && (lit + 3 + ip[0] < 16)
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273 | ) {
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274 | t = *ip++;
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275 | /* remove short run */
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276 | *litp &= ~3;
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277 | /* copy over the 3 literals that replace the match */
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278 | copy3(ip-4+1,m_pos,pd(op,m_pos));
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279 | /* move literals 1 byte ahead */
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280 | litp += 2;
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281 | if (lit > 0)
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282 | memmove(litp+1,litp,lit);
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283 | /* insert new length of long literal run */
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284 | lit += 3 + t + 3;
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285 | *litp = (unsigned char)(lit - 3);
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286 |
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287 | o_m3_b++;
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288 | *op++ = *m_pos++;
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289 | *op++ = *m_pos++;
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290 | *op++ = *m_pos++;
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291 | goto copy_literal_run;
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292 | }
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293 | }
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294 | copy_m:
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295 | *op++ = *m_pos++;
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296 | *op++ = *m_pos++;
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297 | do *op++ = *m_pos++; while (--t > 0);
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298 | }
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299 |
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300 | match_done:
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301 | if (next_lit == NO_LIT) {
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302 | t = ip[-2] & 3;
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303 | lit = t;
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304 | litp = ip - 2;
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305 | }
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306 | else
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307 | t = next_lit;
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308 | next_lit = NO_LIT;
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309 | if (t == 0)
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310 | break;
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311 | /* copy literals */
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312 | match_next:
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313 | do *op++ = *ip++; while (--t > 0);
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314 | t = *ip++;
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315 | } while (TEST_IP && TEST_OP);
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316 | }
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317 |
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318 | /* no EOF code was found */
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319 | *out_len = pd(op, out);
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320 | return LZO_E_EOF_NOT_FOUND;
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321 |
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322 | eof_found:
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323 | // LZO_UNUSED(o_m1_a); LZO_UNUSED(o_m1_b); LZO_UNUSED(o_m2);
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324 | // LZO_UNUSED(o_m3_a); LZO_UNUSED(o_m3_b);
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325 | *out_len = pd(op, out);
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326 | return (ip == ip_end ? LZO_E_OK :
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327 | (ip < ip_end ? LZO_E_INPUT_NOT_CONSUMED : LZO_E_INPUT_OVERRUN));
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328 | }
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329 |
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330 | /**********************************************************************/
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331 | #define F_OS F_OS_UNIX
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332 | #define F_CS F_CS_NATIVE
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333 |
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334 | /**********************************************************************/
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335 | #define ADLER32_INIT_VALUE 1
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336 | #define CRC32_INIT_VALUE 0
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337 |
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338 | /**********************************************************************/
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339 | enum {
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340 | M_LZO1X_1 = 1,
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341 | M_LZO1X_1_15 = 2,
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342 | M_LZO1X_999 = 3,
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343 | };
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344 |
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345 | /**********************************************************************/
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346 | /* header flags */
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347 | #define F_ADLER32_D 0x00000001L
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348 | #define F_ADLER32_C 0x00000002L
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349 | #define F_H_EXTRA_FIELD 0x00000040L
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350 | #define F_H_GMTDIFF 0x00000080L
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351 | #define F_CRC32_D 0x00000100L
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352 | #define F_CRC32_C 0x00000200L
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353 | #define F_H_FILTER 0x00000800L
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354 | #define F_H_CRC32 0x00001000L
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355 | #define F_MASK 0x00003FFFL
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356 |
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357 | /* operating system & file system that created the file [mostly unused] */
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358 | #define F_OS_UNIX 0x03000000L
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359 | #define F_OS_SHIFT 24
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360 | #define F_OS_MASK 0xff000000L
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361 |
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362 | /* character set for file name encoding [mostly unused] */
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363 | #define F_CS_NATIVE 0x00000000L
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364 | #define F_CS_SHIFT 20
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365 | #define F_CS_MASK 0x00f00000L
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366 |
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367 | /* these bits must be zero */
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368 | #define F_RESERVED ((F_MASK | F_OS_MASK | F_CS_MASK) ^ 0xffffffffL)
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369 |
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370 | typedef struct chksum_t {
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371 | uint32_t f_adler32;
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372 | uint32_t f_crc32;
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373 | } chksum_t;
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374 |
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375 | typedef struct header_t {
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376 | unsigned version;
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377 | unsigned lib_version;
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378 | unsigned version_needed_to_extract;
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379 | uint32_t flags;
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380 | uint32_t mode;
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381 | uint32_t mtime;
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382 | uint32_t gmtdiff;
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383 | uint32_t header_checksum;
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384 |
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385 | uint32_t extra_field_len;
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386 | uint32_t extra_field_checksum;
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387 |
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388 | unsigned char method;
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389 | unsigned char level;
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390 |
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391 | /* info */
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392 | char name[255+1];
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393 | } header_t;
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394 |
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395 | struct globals {
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396 | /*const uint32_t *lzo_crc32_table;*/
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397 | chksum_t chksum_in;
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398 | chksum_t chksum_out;
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399 | } FIX_ALIASING;
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400 | #define G (*(struct globals*)&bb_common_bufsiz1)
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401 | #define INIT_G() do { } while (0)
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402 | //#define G (*ptr_to_globals)
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403 | //#define INIT_G() do {
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404 | // SET_PTR_TO_GLOBALS(xzalloc(sizeof(G)));
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405 | //} while (0)
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406 |
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407 |
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408 | /**********************************************************************/
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409 | #define LZOP_VERSION 0x1010
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410 | //#define LZOP_VERSION_STRING "1.01"
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411 | //#define LZOP_VERSION_DATE "Apr 27th 2003"
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412 |
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413 | #define OPTION_STRING "cfvdt123456789CF"
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414 |
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415 | enum {
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416 | OPT_STDOUT = (1 << 0),
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417 | OPT_FORCE = (1 << 1),
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418 | OPT_VERBOSE = (1 << 2),
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419 | OPT_DECOMPRESS = (1 << 3),
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420 | OPT_TEST = (1 << 4),
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421 | OPT_1 = (1 << 5),
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422 | OPT_2 = (1 << 6),
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423 | OPT_3 = (1 << 7),
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424 | OPT_4 = (1 << 8),
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425 | OPT_5 = (1 << 9),
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426 | OPT_6 = (1 << 10),
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427 | OPT_789 = (7 << 11),
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428 | OPT_7 = (1 << 11),
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429 | OPT_8 = (1 << 12),
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430 | OPT_C = (1 << 14),
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431 | OPT_F = (1 << 15),
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432 | };
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433 |
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434 | /**********************************************************************/
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435 | // adler32 checksum
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436 | // adapted from free code by Mark Adler <madler@alumni.caltech.edu>
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437 | // see http://www.zlib.org/
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438 | /**********************************************************************/
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439 | static FAST_FUNC uint32_t
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440 | lzo_adler32(uint32_t adler, const uint8_t* buf, unsigned len)
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441 | {
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442 | enum {
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443 | LZO_BASE = 65521, /* largest prime smaller than 65536 */
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444 | /* NMAX is the largest n such that
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445 | * 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
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446 | LZO_NMAX = 5552,
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447 | };
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448 | uint32_t s1 = adler & 0xffff;
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449 | uint32_t s2 = (adler >> 16) & 0xffff;
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450 | unsigned k;
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451 |
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452 | if (buf == NULL)
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453 | return 1;
|
---|
454 |
|
---|
455 | while (len > 0) {
|
---|
456 | k = len < LZO_NMAX ? (unsigned) len : LZO_NMAX;
|
---|
457 | len -= k;
|
---|
458 | if (k != 0) do {
|
---|
459 | s1 += *buf++;
|
---|
460 | s2 += s1;
|
---|
461 | } while (--k > 0);
|
---|
462 | s1 %= LZO_BASE;
|
---|
463 | s2 %= LZO_BASE;
|
---|
464 | }
|
---|
465 | return (s2 << 16) | s1;
|
---|
466 | }
|
---|
467 |
|
---|
468 | static FAST_FUNC uint32_t
|
---|
469 | lzo_crc32(uint32_t c, const uint8_t* buf, unsigned len)
|
---|
470 | {
|
---|
471 | //if (buf == NULL) - impossible
|
---|
472 | // return 0;
|
---|
473 |
|
---|
474 | return ~crc32_block_endian0(~c, buf, len, global_crc32_table);
|
---|
475 | }
|
---|
476 |
|
---|
477 | /**********************************************************************/
|
---|
478 | static void init_chksum(chksum_t *ct)
|
---|
479 | {
|
---|
480 | ct->f_adler32 = ADLER32_INIT_VALUE;
|
---|
481 | ct->f_crc32 = CRC32_INIT_VALUE;
|
---|
482 | }
|
---|
483 |
|
---|
484 | static void add_bytes_to_chksum(chksum_t *ct, const void* buf, int cnt)
|
---|
485 | {
|
---|
486 | /* We need to handle the two checksums at once, because at the
|
---|
487 | * beginning of the header, we don't know yet which one we'll
|
---|
488 | * eventually need */
|
---|
489 | ct->f_adler32 = lzo_adler32(ct->f_adler32, (const uint8_t*)buf, cnt);
|
---|
490 | ct->f_crc32 = lzo_crc32(ct->f_crc32, (const uint8_t*)buf, cnt);
|
---|
491 | }
|
---|
492 |
|
---|
493 | static uint32_t chksum_getresult(chksum_t *ct, const header_t *h)
|
---|
494 | {
|
---|
495 | return (h->flags & F_H_CRC32) ? ct->f_crc32 : ct->f_adler32;
|
---|
496 | }
|
---|
497 |
|
---|
498 | /**********************************************************************/
|
---|
499 | static uint32_t read32(void)
|
---|
500 | {
|
---|
501 | uint32_t v;
|
---|
502 | xread(0, &v, 4);
|
---|
503 | return ntohl(v);
|
---|
504 | }
|
---|
505 |
|
---|
506 | static void write32(uint32_t v)
|
---|
507 | {
|
---|
508 | v = htonl(v);
|
---|
509 | xwrite(1, &v, 4);
|
---|
510 | }
|
---|
511 |
|
---|
512 | static void f_write(const void* buf, int cnt)
|
---|
513 | {
|
---|
514 | xwrite(1, buf, cnt);
|
---|
515 | add_bytes_to_chksum(&G.chksum_out, buf, cnt);
|
---|
516 | }
|
---|
517 |
|
---|
518 | static void f_read(void* buf, int cnt)
|
---|
519 | {
|
---|
520 | xread(0, buf, cnt);
|
---|
521 | add_bytes_to_chksum(&G.chksum_in, buf, cnt);
|
---|
522 | }
|
---|
523 |
|
---|
524 | static int f_read8(void)
|
---|
525 | {
|
---|
526 | uint8_t v;
|
---|
527 | f_read(&v, 1);
|
---|
528 | return v;
|
---|
529 | }
|
---|
530 |
|
---|
531 | static void f_write8(uint8_t v)
|
---|
532 | {
|
---|
533 | f_write(&v, 1);
|
---|
534 | }
|
---|
535 |
|
---|
536 | static unsigned f_read16(void)
|
---|
537 | {
|
---|
538 | uint16_t v;
|
---|
539 | f_read(&v, 2);
|
---|
540 | return ntohs(v);
|
---|
541 | }
|
---|
542 |
|
---|
543 | static void f_write16(uint16_t v)
|
---|
544 | {
|
---|
545 | v = htons(v);
|
---|
546 | f_write(&v, 2);
|
---|
547 | }
|
---|
548 |
|
---|
549 | static uint32_t f_read32(void)
|
---|
550 | {
|
---|
551 | uint32_t v;
|
---|
552 | f_read(&v, 4);
|
---|
553 | return ntohl(v);
|
---|
554 | }
|
---|
555 |
|
---|
556 | static void f_write32(uint32_t v)
|
---|
557 | {
|
---|
558 | v = htonl(v);
|
---|
559 | f_write(&v, 4);
|
---|
560 | }
|
---|
561 |
|
---|
562 | /**********************************************************************/
|
---|
563 | static int lzo_get_method(header_t *h)
|
---|
564 | {
|
---|
565 | /* check method */
|
---|
566 | if (h->method == M_LZO1X_1) {
|
---|
567 | if (h->level == 0)
|
---|
568 | h->level = 3;
|
---|
569 | } else if (h->method == M_LZO1X_1_15) {
|
---|
570 | if (h->level == 0)
|
---|
571 | h->level = 1;
|
---|
572 | } else if (h->method == M_LZO1X_999) {
|
---|
573 | if (h->level == 0)
|
---|
574 | h->level = 9;
|
---|
575 | } else
|
---|
576 | return -1; /* not a LZO method */
|
---|
577 |
|
---|
578 | /* check compression level */
|
---|
579 | if (h->level < 1 || h->level > 9)
|
---|
580 | return 15;
|
---|
581 |
|
---|
582 | return 0;
|
---|
583 | }
|
---|
584 |
|
---|
585 | /**********************************************************************/
|
---|
586 | #define LZO_BLOCK_SIZE (256 * 1024l)
|
---|
587 | #define MAX_BLOCK_SIZE (64 * 1024l * 1024l) /* DO NOT CHANGE */
|
---|
588 |
|
---|
589 | /* LZO may expand uncompressible data by a small amount */
|
---|
590 | #define MAX_COMPRESSED_SIZE(x) ((x) + (x) / 16 + 64 + 3)
|
---|
591 |
|
---|
592 | /**********************************************************************/
|
---|
593 | // compress a file
|
---|
594 | /**********************************************************************/
|
---|
595 | static NOINLINE smallint lzo_compress(const header_t *h)
|
---|
596 | {
|
---|
597 | unsigned block_size = LZO_BLOCK_SIZE;
|
---|
598 | int r = 0; /* LZO_E_OK */
|
---|
599 | uint8_t *const b1 = xzalloc(block_size);
|
---|
600 | uint8_t *const b2 = xzalloc(MAX_COMPRESSED_SIZE(block_size));
|
---|
601 | unsigned src_len = 0, dst_len = 0;
|
---|
602 | uint32_t d_adler32 = ADLER32_INIT_VALUE;
|
---|
603 | uint32_t d_crc32 = CRC32_INIT_VALUE;
|
---|
604 | int l;
|
---|
605 | smallint ok = 1;
|
---|
606 | uint8_t *wrk_mem = NULL;
|
---|
607 |
|
---|
608 | if (h->method == M_LZO1X_1)
|
---|
609 | wrk_mem = xzalloc(LZO1X_1_MEM_COMPRESS);
|
---|
610 | else if (h->method == M_LZO1X_1_15)
|
---|
611 | wrk_mem = xzalloc(LZO1X_1_15_MEM_COMPRESS);
|
---|
612 | else if (h->method == M_LZO1X_999)
|
---|
613 | wrk_mem = xzalloc(LZO1X_999_MEM_COMPRESS);
|
---|
614 |
|
---|
615 | for (;;) {
|
---|
616 | /* read a block */
|
---|
617 | l = full_read(0, b1, block_size);
|
---|
618 | src_len = (l > 0 ? l : 0);
|
---|
619 |
|
---|
620 | /* write uncompressed block size */
|
---|
621 | write32(src_len);
|
---|
622 |
|
---|
623 | /* exit if last block */
|
---|
624 | if (src_len == 0)
|
---|
625 | break;
|
---|
626 |
|
---|
627 | /* compute checksum of uncompressed block */
|
---|
628 | if (h->flags & F_ADLER32_D)
|
---|
629 | d_adler32 = lzo_adler32(ADLER32_INIT_VALUE, b1, src_len);
|
---|
630 | if (h->flags & F_CRC32_D)
|
---|
631 | d_crc32 = lzo_crc32(CRC32_INIT_VALUE, b1, src_len);
|
---|
632 |
|
---|
633 | /* compress */
|
---|
634 | if (h->method == M_LZO1X_1)
|
---|
635 | r = lzo1x_1_compress(b1, src_len, b2, &dst_len, wrk_mem);
|
---|
636 | else if (h->method == M_LZO1X_1_15)
|
---|
637 | r = lzo1x_1_15_compress(b1, src_len, b2, &dst_len, wrk_mem);
|
---|
638 | #if ENABLE_LZOP_COMPR_HIGH
|
---|
639 | else if (h->method == M_LZO1X_999)
|
---|
640 | r = lzo1x_999_compress_level(b1, src_len, b2, &dst_len,
|
---|
641 | wrk_mem, h->level);
|
---|
642 | #endif
|
---|
643 | else
|
---|
644 | bb_error_msg_and_die("internal error");
|
---|
645 |
|
---|
646 | if (r != 0) /* not LZO_E_OK */
|
---|
647 | bb_error_msg_and_die("internal error - compression failed");
|
---|
648 |
|
---|
649 | /* write compressed block size */
|
---|
650 | if (dst_len < src_len) {
|
---|
651 | /* optimize */
|
---|
652 | if (h->method == M_LZO1X_999) {
|
---|
653 | unsigned new_len = src_len;
|
---|
654 | r = lzo1x_optimize(b2, dst_len, b1, &new_len, NULL);
|
---|
655 | if (r != 0 /*LZO_E_OK*/ || new_len != src_len)
|
---|
656 | bb_error_msg_and_die("internal error - optimization failed");
|
---|
657 | }
|
---|
658 | write32(dst_len);
|
---|
659 | } else {
|
---|
660 | /* data actually expanded => store data uncompressed */
|
---|
661 | write32(src_len);
|
---|
662 | }
|
---|
663 |
|
---|
664 | /* write checksum of uncompressed block */
|
---|
665 | if (h->flags & F_ADLER32_D)
|
---|
666 | write32(d_adler32);
|
---|
667 | if (h->flags & F_CRC32_D)
|
---|
668 | write32(d_crc32);
|
---|
669 |
|
---|
670 | if (dst_len < src_len) {
|
---|
671 | /* write checksum of compressed block */
|
---|
672 | if (h->flags & F_ADLER32_C)
|
---|
673 | write32(lzo_adler32(ADLER32_INIT_VALUE, b2, dst_len));
|
---|
674 | if (h->flags & F_CRC32_C)
|
---|
675 | write32(lzo_crc32(CRC32_INIT_VALUE, b2, dst_len));
|
---|
676 | /* write compressed block data */
|
---|
677 | xwrite(1, b2, dst_len);
|
---|
678 | } else {
|
---|
679 | /* write uncompressed block data */
|
---|
680 | xwrite(1, b1, src_len);
|
---|
681 | }
|
---|
682 | }
|
---|
683 |
|
---|
684 | free(wrk_mem);
|
---|
685 | free(b1);
|
---|
686 | free(b2);
|
---|
687 | return ok;
|
---|
688 | }
|
---|
689 |
|
---|
690 | static FAST_FUNC void lzo_check(
|
---|
691 | uint32_t init,
|
---|
692 | uint8_t* buf, unsigned len,
|
---|
693 | uint32_t FAST_FUNC (*fn)(uint32_t, const uint8_t*, unsigned),
|
---|
694 | uint32_t ref)
|
---|
695 | {
|
---|
696 | /* This function, by having the same order of parameters
|
---|
697 | * as fn, and by being marked FAST_FUNC (same as fn),
|
---|
698 | * saves a dozen bytes of code.
|
---|
699 | */
|
---|
700 | uint32_t c = fn(init, buf, len);
|
---|
701 | if (c != ref)
|
---|
702 | bb_error_msg_and_die("checksum error");
|
---|
703 | }
|
---|
704 |
|
---|
705 | /**********************************************************************/
|
---|
706 | // decompress a file
|
---|
707 | /**********************************************************************/
|
---|
708 | static NOINLINE smallint lzo_decompress(const header_t *h)
|
---|
709 | {
|
---|
710 | unsigned block_size = LZO_BLOCK_SIZE;
|
---|
711 | int r;
|
---|
712 | uint32_t src_len, dst_len;
|
---|
713 | uint32_t c_adler32 = ADLER32_INIT_VALUE;
|
---|
714 | uint32_t d_adler32 = ADLER32_INIT_VALUE;
|
---|
715 | uint32_t c_crc32 = CRC32_INIT_VALUE, d_crc32 = CRC32_INIT_VALUE;
|
---|
716 | smallint ok = 1;
|
---|
717 | uint8_t *b1;
|
---|
718 | uint32_t mcs_block_size = MAX_COMPRESSED_SIZE(block_size);
|
---|
719 | uint8_t *b2 = NULL;
|
---|
720 |
|
---|
721 | for (;;) {
|
---|
722 | uint8_t *dst;
|
---|
723 |
|
---|
724 | /* read uncompressed block size */
|
---|
725 | dst_len = read32();
|
---|
726 |
|
---|
727 | /* exit if last block */
|
---|
728 | if (dst_len == 0)
|
---|
729 | break;
|
---|
730 |
|
---|
731 | /* error if split file */
|
---|
732 | if (dst_len == 0xffffffffL)
|
---|
733 | /* should not happen - not yet implemented */
|
---|
734 | bb_error_msg_and_die("this file is a split lzop file");
|
---|
735 |
|
---|
736 | if (dst_len > MAX_BLOCK_SIZE)
|
---|
737 | bb_error_msg_and_die("corrupted data");
|
---|
738 |
|
---|
739 | /* read compressed block size */
|
---|
740 | src_len = read32();
|
---|
741 | if (src_len <= 0 || src_len > dst_len)
|
---|
742 | bb_error_msg_and_die("corrupted data");
|
---|
743 |
|
---|
744 | if (dst_len > block_size) {
|
---|
745 | if (b2) {
|
---|
746 | free(b2);
|
---|
747 | b2 = NULL;
|
---|
748 | }
|
---|
749 | block_size = dst_len;
|
---|
750 | mcs_block_size = MAX_COMPRESSED_SIZE(block_size);
|
---|
751 | }
|
---|
752 |
|
---|
753 | /* read checksum of uncompressed block */
|
---|
754 | if (h->flags & F_ADLER32_D)
|
---|
755 | d_adler32 = read32();
|
---|
756 | if (h->flags & F_CRC32_D)
|
---|
757 | d_crc32 = read32();
|
---|
758 |
|
---|
759 | /* read checksum of compressed block */
|
---|
760 | if (src_len < dst_len) {
|
---|
761 | if (h->flags & F_ADLER32_C)
|
---|
762 | c_adler32 = read32();
|
---|
763 | if (h->flags & F_CRC32_C)
|
---|
764 | c_crc32 = read32();
|
---|
765 | }
|
---|
766 |
|
---|
767 | if (b2 == NULL)
|
---|
768 | b2 = xzalloc(mcs_block_size);
|
---|
769 | /* read the block into the end of our buffer */
|
---|
770 | b1 = b2 + mcs_block_size - src_len;
|
---|
771 | xread(0, b1, src_len);
|
---|
772 |
|
---|
773 | if (src_len < dst_len) {
|
---|
774 | unsigned d = dst_len;
|
---|
775 |
|
---|
776 | if (!(option_mask32 & OPT_F)) {
|
---|
777 | /* verify checksum of compressed block */
|
---|
778 | if (h->flags & F_ADLER32_C)
|
---|
779 | lzo_check(ADLER32_INIT_VALUE,
|
---|
780 | b1, src_len,
|
---|
781 | lzo_adler32, c_adler32);
|
---|
782 | if (h->flags & F_CRC32_C)
|
---|
783 | lzo_check(CRC32_INIT_VALUE,
|
---|
784 | b1, src_len,
|
---|
785 | lzo_crc32, c_crc32);
|
---|
786 | }
|
---|
787 |
|
---|
788 | /* decompress */
|
---|
789 | // if (option_mask32 & OPT_F)
|
---|
790 | // r = lzo1x_decompress(b1, src_len, b2, &d, NULL);
|
---|
791 | // else
|
---|
792 | r = lzo1x_decompress_safe(b1, src_len, b2, &d, NULL);
|
---|
793 |
|
---|
794 | if (r != 0 /*LZO_E_OK*/ || dst_len != d) {
|
---|
795 | bb_error_msg_and_die("corrupted data");
|
---|
796 | }
|
---|
797 | dst = b2;
|
---|
798 | } else {
|
---|
799 | /* "stored" block => no decompression */
|
---|
800 | dst = b1;
|
---|
801 | }
|
---|
802 |
|
---|
803 | if (!(option_mask32 & OPT_F)) {
|
---|
804 | /* verify checksum of uncompressed block */
|
---|
805 | if (h->flags & F_ADLER32_D)
|
---|
806 | lzo_check(ADLER32_INIT_VALUE,
|
---|
807 | dst, dst_len,
|
---|
808 | lzo_adler32, d_adler32);
|
---|
809 | if (h->flags & F_CRC32_D)
|
---|
810 | lzo_check(CRC32_INIT_VALUE,
|
---|
811 | dst, dst_len,
|
---|
812 | lzo_crc32, d_crc32);
|
---|
813 | }
|
---|
814 |
|
---|
815 | /* write uncompressed block data */
|
---|
816 | xwrite(1, dst, dst_len);
|
---|
817 | }
|
---|
818 |
|
---|
819 | free(b2);
|
---|
820 | return ok;
|
---|
821 | }
|
---|
822 |
|
---|
823 | /**********************************************************************/
|
---|
824 | // lzop file signature (shamelessly borrowed from PNG)
|
---|
825 | /**********************************************************************/
|
---|
826 | /*
|
---|
827 | * The first nine bytes of a lzop file always contain the following values:
|
---|
828 | *
|
---|
829 | * 0 1 2 3 4 5 6 7 8
|
---|
830 | * --- --- --- --- --- --- --- --- ---
|
---|
831 | * (hex) 89 4c 5a 4f 00 0d 0a 1a 0a
|
---|
832 | * (decimal) 137 76 90 79 0 13 10 26 10
|
---|
833 | * (C notation - ASCII) \211 L Z O \0 \r \n \032 \n
|
---|
834 | */
|
---|
835 |
|
---|
836 | /* (vda) comparison with lzop v1.02rc1 ("lzop -1 <FILE" cmd):
|
---|
837 | * Only slight differences in header:
|
---|
838 | * -00000000 89 4c 5a 4f 00 0d 0a 1a 0a 10 20 20 20 09 40 02
|
---|
839 | * +00000000 89 4c 5a 4f 00 0d 0a 1a 0a 10 10 20 30 09 40 02
|
---|
840 | * ^^^^^ ^^^^^
|
---|
841 | * version lib_version
|
---|
842 | * -00000010 01 03 00 00 0d 00 00 81 a4 49 f7 a6 3f 00 00 00
|
---|
843 | * +00000010 01 03 00 00 01 00 00 00 00 00 00 00 00 00 00 00
|
---|
844 | * ^^^^^^^^^^^ ^^^^^^^^^^^ ^^^^^^^^^^^
|
---|
845 | * flags mode mtime
|
---|
846 | * -00000020 00 00 2d 67 04 17 00 04 00 00 00 03 ed ec 9d 6d
|
---|
847 | * +00000020 00 00 10 5f 00 c1 00 04 00 00 00 03 ed ec 9d 6d
|
---|
848 | * ^^^^^^^^^^^
|
---|
849 | * chksum_out
|
---|
850 | * The rest is identical.
|
---|
851 | */
|
---|
852 | static const unsigned char lzop_magic[9] = {
|
---|
853 | 0x89, 0x4c, 0x5a, 0x4f, 0x00, 0x0d, 0x0a, 0x1a, 0x0a
|
---|
854 | };
|
---|
855 |
|
---|
856 | /* This coding is derived from Alexander Lehmann's pngcheck code. */
|
---|
857 | static void check_magic(void)
|
---|
858 | {
|
---|
859 | unsigned char magic[sizeof(lzop_magic)];
|
---|
860 | xread(0, magic, sizeof(magic));
|
---|
861 | if (memcmp(magic, lzop_magic, sizeof(lzop_magic)) != 0)
|
---|
862 | bb_error_msg_and_die("bad magic number");
|
---|
863 | }
|
---|
864 |
|
---|
865 | /**********************************************************************/
|
---|
866 | // lzop file header
|
---|
867 | /**********************************************************************/
|
---|
868 | static void write_header(const header_t *h)
|
---|
869 | {
|
---|
870 | int l;
|
---|
871 |
|
---|
872 | xwrite(1, lzop_magic, sizeof(lzop_magic));
|
---|
873 |
|
---|
874 | init_chksum(&G.chksum_out);
|
---|
875 |
|
---|
876 | f_write16(h->version);
|
---|
877 | f_write16(h->lib_version);
|
---|
878 | f_write16(h->version_needed_to_extract);
|
---|
879 | f_write8(h->method);
|
---|
880 | f_write8(h->level);
|
---|
881 | f_write32(h->flags);
|
---|
882 | f_write32(h->mode);
|
---|
883 | f_write32(h->mtime);
|
---|
884 | f_write32(h->gmtdiff);
|
---|
885 |
|
---|
886 | l = (int) strlen(h->name);
|
---|
887 | f_write8(l);
|
---|
888 | if (l)
|
---|
889 | f_write(h->name, l);
|
---|
890 |
|
---|
891 | f_write32(chksum_getresult(&G.chksum_out, h));
|
---|
892 | }
|
---|
893 |
|
---|
894 | static int read_header(header_t *h)
|
---|
895 | {
|
---|
896 | int r;
|
---|
897 | int l;
|
---|
898 | uint32_t checksum;
|
---|
899 |
|
---|
900 | memset(h, 0, sizeof(*h));
|
---|
901 | h->version_needed_to_extract = 0x0900; /* first lzop version */
|
---|
902 | h->level = 0;
|
---|
903 |
|
---|
904 | init_chksum(&G.chksum_in);
|
---|
905 |
|
---|
906 | h->version = f_read16();
|
---|
907 | if (h->version < 0x0900)
|
---|
908 | return 3;
|
---|
909 | h->lib_version = f_read16();
|
---|
910 | if (h->version >= 0x0940) {
|
---|
911 | h->version_needed_to_extract = f_read16();
|
---|
912 | if (h->version_needed_to_extract > LZOP_VERSION)
|
---|
913 | return 16;
|
---|
914 | if (h->version_needed_to_extract < 0x0900)
|
---|
915 | return 3;
|
---|
916 | }
|
---|
917 | h->method = f_read8();
|
---|
918 | if (h->version >= 0x0940)
|
---|
919 | h->level = f_read8();
|
---|
920 | h->flags = f_read32();
|
---|
921 | if (h->flags & F_H_FILTER)
|
---|
922 | return 16; /* filter not supported */
|
---|
923 | h->mode = f_read32();
|
---|
924 | h->mtime = f_read32();
|
---|
925 | if (h->version >= 0x0940)
|
---|
926 | h->gmtdiff = f_read32();
|
---|
927 |
|
---|
928 | l = f_read8();
|
---|
929 | if (l > 0)
|
---|
930 | f_read(h->name, l);
|
---|
931 | h->name[l] = 0;
|
---|
932 |
|
---|
933 | checksum = chksum_getresult(&G.chksum_in, h);
|
---|
934 | h->header_checksum = f_read32();
|
---|
935 | if (h->header_checksum != checksum)
|
---|
936 | return 2;
|
---|
937 |
|
---|
938 | if (h->method <= 0)
|
---|
939 | return 14;
|
---|
940 | r = lzo_get_method(h);
|
---|
941 | if (r != 0)
|
---|
942 | return r;
|
---|
943 |
|
---|
944 | /* check reserved flags */
|
---|
945 | if (h->flags & F_RESERVED)
|
---|
946 | return -13;
|
---|
947 |
|
---|
948 | /* skip extra field [not used yet] */
|
---|
949 | if (h->flags & F_H_EXTRA_FIELD) {
|
---|
950 | uint32_t k;
|
---|
951 |
|
---|
952 | /* note: the checksum also covers the length */
|
---|
953 | init_chksum(&G.chksum_in);
|
---|
954 | h->extra_field_len = f_read32();
|
---|
955 | for (k = 0; k < h->extra_field_len; k++)
|
---|
956 | f_read8();
|
---|
957 | checksum = chksum_getresult(&G.chksum_in, h);
|
---|
958 | h->extra_field_checksum = f_read32();
|
---|
959 | if (h->extra_field_checksum != checksum)
|
---|
960 | return 3;
|
---|
961 | }
|
---|
962 |
|
---|
963 | return 0;
|
---|
964 | }
|
---|
965 |
|
---|
966 | static void p_header(header_t *h)
|
---|
967 | {
|
---|
968 | int r;
|
---|
969 |
|
---|
970 | r = read_header(h);
|
---|
971 | if (r == 0)
|
---|
972 | return;
|
---|
973 | bb_error_msg_and_die("header_error %d", r);
|
---|
974 | }
|
---|
975 |
|
---|
976 | /**********************************************************************/
|
---|
977 | // compress
|
---|
978 | /**********************************************************************/
|
---|
979 | static void lzo_set_method(header_t *h)
|
---|
980 | {
|
---|
981 | int level = 1;
|
---|
982 |
|
---|
983 | if (option_mask32 & OPT_1) {
|
---|
984 | h->method = M_LZO1X_1_15;
|
---|
985 | } else if (option_mask32 & OPT_789) {
|
---|
986 | #if ENABLE_LZOP_COMPR_HIGH
|
---|
987 | h->method = M_LZO1X_999;
|
---|
988 | if (option_mask32 & OPT_7)
|
---|
989 | level = 7;
|
---|
990 | else if (option_mask32 & OPT_8)
|
---|
991 | level = 8;
|
---|
992 | else
|
---|
993 | level = 9;
|
---|
994 | #else
|
---|
995 | bb_error_msg_and_die("high compression not compiled in");
|
---|
996 | #endif
|
---|
997 | } else { /* levels 2..6 or none (defaults to level 3) */
|
---|
998 | h->method = M_LZO1X_1;
|
---|
999 | level = 5; /* levels 2-6 are actually the same */
|
---|
1000 | }
|
---|
1001 |
|
---|
1002 | h->level = level;
|
---|
1003 | }
|
---|
1004 |
|
---|
1005 | static smallint do_lzo_compress(void)
|
---|
1006 | {
|
---|
1007 | header_t header;
|
---|
1008 |
|
---|
1009 | #define h (&header)
|
---|
1010 | memset(h, 0, sizeof(*h));
|
---|
1011 |
|
---|
1012 | lzo_set_method(h);
|
---|
1013 |
|
---|
1014 | h->version = (LZOP_VERSION & 0xffff);
|
---|
1015 | h->version_needed_to_extract = 0x0940;
|
---|
1016 | h->lib_version = lzo_version() & 0xffff;
|
---|
1017 |
|
---|
1018 | h->flags = (F_OS & F_OS_MASK) | (F_CS & F_CS_MASK);
|
---|
1019 |
|
---|
1020 | if (!(option_mask32 & OPT_F) || h->method == M_LZO1X_999) {
|
---|
1021 | h->flags |= F_ADLER32_D;
|
---|
1022 | if (option_mask32 & OPT_C)
|
---|
1023 | h->flags |= F_ADLER32_C;
|
---|
1024 | }
|
---|
1025 | write_header(h);
|
---|
1026 | return lzo_compress(h);
|
---|
1027 | #undef h
|
---|
1028 | }
|
---|
1029 |
|
---|
1030 | /**********************************************************************/
|
---|
1031 | // decompress
|
---|
1032 | /**********************************************************************/
|
---|
1033 | static smallint do_lzo_decompress(void)
|
---|
1034 | {
|
---|
1035 | header_t header;
|
---|
1036 |
|
---|
1037 | check_magic();
|
---|
1038 | p_header(&header);
|
---|
1039 | return lzo_decompress(&header);
|
---|
1040 | }
|
---|
1041 |
|
---|
1042 | static char* FAST_FUNC make_new_name_lzop(char *filename, const char *expected_ext UNUSED_PARAM)
|
---|
1043 | {
|
---|
1044 | if (option_mask32 & OPT_DECOMPRESS) {
|
---|
1045 | char *extension = strrchr(filename, '.');
|
---|
1046 | if (!extension || strcmp(extension + 1, "lzo") != 0)
|
---|
1047 | return xasprintf("%s.out", filename);
|
---|
1048 | *extension = '\0';
|
---|
1049 | return filename;
|
---|
1050 | }
|
---|
1051 | return xasprintf("%s.lzo", filename);
|
---|
1052 | }
|
---|
1053 |
|
---|
1054 | static IF_DESKTOP(long long) int FAST_FUNC pack_lzop(unpack_info_t *info UNUSED_PARAM)
|
---|
1055 | {
|
---|
1056 | if (option_mask32 & OPT_DECOMPRESS)
|
---|
1057 | return do_lzo_decompress();
|
---|
1058 | return do_lzo_compress();
|
---|
1059 | }
|
---|
1060 |
|
---|
1061 | int lzop_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
1062 | int lzop_main(int argc UNUSED_PARAM, char **argv)
|
---|
1063 | {
|
---|
1064 | getopt32(argv, OPTION_STRING);
|
---|
1065 | argv += optind;
|
---|
1066 | /* lzopcat? */
|
---|
1067 | if (applet_name[4] == 'c')
|
---|
1068 | option_mask32 |= (OPT_STDOUT | OPT_DECOMPRESS);
|
---|
1069 | /* unlzop? */
|
---|
1070 | if (applet_name[0] == 'u')
|
---|
1071 | option_mask32 |= OPT_DECOMPRESS;
|
---|
1072 |
|
---|
1073 | global_crc32_table = crc32_filltable(NULL, 0);
|
---|
1074 | return bbunpack(argv, pack_lzop, make_new_name_lzop, /*unused:*/ NULL);
|
---|
1075 | }
|
---|